Tank for rust-proofing metals.



W. C. PARKER.

TANK FOR RUST PROOFING METALS.

APPLICATION FILED 1ANI2I I9I6. 1,185,343. PIIIenIed May 30,1916.

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IIIIImIIIII.. 1IIIIcIIIIJ I I II IIIIIIJ w. c. PARKER. TANK FOR RUST PROOFING METALS.

APPLICATION FILED IAN-12,1916.`

` Patented May 30, 1916.

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" the inner vreceptacle'being imperforate, and

WYMAN c. PARKER, or` DETROIT, MIHIe-AN, A ssIeNon.l To CLARK w. PARKR, or l DETROIT, MICHIGAN.

TANK. non RUST-PROOIING METALs.

1 To all whom t may concern: i

State of Michigan, have invented a new and lmproved Tank for Rust-'Proofing Metals, of which the following is a specification.

Thisinvention relates to `double tanks especially adapted for the treatment of metals by means of acid bathsl under the influence of sufficient heatto set' up currents l of theliquids within the tanks, .and yits object is' toprovide a double tank wherein the liquid'may be heated in an outer receptacle andthen'iOw into an inner receptacle without agitating any deposits or l prec1p1- tetes in such inner' receptacle.

This invention consists of-a plurality-of',

receptacles, one within'vthe other and'spaoed' therefrom, the bottom and lower portion of the height of the liquid in theouter receptacle andthe construction of the inner ref 'ceptacle being such 4that the' heated lliquid .may circulate freely from one receptacle to l the other.

this double tank on alarger scale.

lt'fu'rtherconsists in supplying the inner. receptacle witha discharging device to permit. the' decantingv of thecontents of the toa certain predeinner receptacle down termined level.

ln the accompanying drawings-,Figure 1 is a plan of -this impro-ved double tank, a

portion of the rims 'of the outer casing and outer receptacle being broken away. Fig. 2 is a lcentral longitudinal section oi? the double tank. Fig. 3 isa cross section of Fig. 4 is a cross section ci a modified form ot this double tank.'v llig. 5 is a horizontal section yand .lig 6 is a vertical section of portions of the outer casing. Fig. 7 is a vertical section-'of the discharge valve;

Similar reference characters refer to -like parts throughout the several views.

The structure shown in the drawings con'l sists of inner and outer receptacles andan youter shell or casing adapted to prevent loss yot' heat as far as possible, and built up of side plates'l and end plates 2, both linedwith sheets '43` of asbestos. l

may be secured together by means of bolts e as shown in Fig- 5. 'Burnerpipes 5 may `These plates extend near the bottom of 'the casing and Specification of Letters Patent.

Patented May so, ieile.

Appneatiog meu .Ianuary 12, 191e. serial No. 71,624. 1

"connect to the air 'pipe 6 and gas pipe 7 by -means of valves 8. l

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The outer receptaclelmay'be supported in any desired manner, short pillars lO'being-` preferredl It is preferably formed with a Hat bottom 12 and with ,vertical-' sides 13 and 14, and positioned near its bottom rela.

tive to the casingl by small angle-iron brackets 15 if desired. .An angle bar 16 is prefer- 4ably secured tothe upperfedge of this outer receptacle and tothe upper edge of the casof combustion may escape from the space 19 (Fig. 3)although either may be omit- 7o ted if desired. A cover 20 for this tank may` y be hinged to the vangle bar 16 if desired.

The inner receptacle is removable and is..v

shown Aresting on the Iwbeams 2 2 which are .preferably cut out just above thev burner-v `tubes 5 to permit free flow4 ofthe `liquid gwthinnthe outer receptacle.

p rlhe inner receptacle conslsts of'an imperforate bottom 23, and the sides 24 ends 25 kformed with] holes 26 through whih the liquid in 'the tank may flow freely. v

Secured to the bottom 23 around an open'- ing 27 is a threaded ring 28 (Fig. 7) into whichy the short pipe k29 is screwed. The upper end of this pipe is formed into a `seat for the valve 30 Whicli is made quiteheavy, and may be provided with` an eyev 31'- by means of which *it can' be'lifted from its seat. lf desired, the upper edge of the inner receptacle may be reinforced by means of. a strap 32, while an angle b ar 33 may besecured near the top/ot' the outer receptacle for a purpose hereinafter set forth.

NV hen a proper mixture ot air and gas is burned-*at the openings in the tops ofthe burner tubes 5, a circulation ofthe liquid will occur through'the rising ofthe hotter vportions thereof. 4'llhe liquid will How in and out through the openings 26 so that the temperature of the liquid within the inner receptacle will be kept nearly. as high as in ico the outer receptacle. lf `the heat applied is sufficient to cause the liquid to boil up, the

th@ .inner receptacle, :the hottest liquidv en- .angle bar 33 will prevent the liquid from j I flowing out over the edge of the outer recep-A 1051' @5i-f ing by means of the bolts 17. The products,l

i ters through these holes and the sediment in this inner receptacle is kept in constant agitation, and this sediment settleson the articles being treated within the inner recep- V tacle.

formed in the sides of the inner receptaclev This also occurs when holes are Any sediment from the articles being treated in this double tank will fall to the bottom of the inner receptacle, where it will remain practically undisturbed, because of the liquid at the top of the inner receptacle being hotter than at the bottom. At proper intervals of time, the valve 30is removed and the inner receptacle is slowly lifted out, the liquid contents thereof flowing down through the short pipe 29 into the outer receptacle. When the inner receptacle is entirely free, the pipe 29 may be removed and the sediment permitted to drain out, a hose being employed to wash out this receptacle if desired. After being cleaned, the inner receptacle is replaced, the liquid in the outer receptacle flowingup through the pipe 29, after which the valve 30 is replaced. Very little o-f vthe liquid is wasted `when the tank is cleaned and none of the sediment is kept in suspension as it is when heat is applied directly to the inner receptacle or when the bottom of the inner receptacle is perforated. If desired, the sides and ends of the inner receptacle may be so low as to be below the level of the liquid as shown in Fig. 4, in

`which case the holes 26 are unnecessary.

When the holes 26 are used, the articles being treated should be belowthe level of these holes.

I claim:

1. ln a double tank, the combination of an outer receptacle and a second receptacle within the first and spaced therefrom, said inner receptacle having an .imperforate bottom and having sides formed with a row of openings near their upper edges, the sides bel low the openings belng imperforate.

2. In a double tank, the combination of an outer receptacle, a second receptacle within the first and spaced therefrom, and a discharging device mounted on the bottom of the inner receptacle and .adapted to permit the liquids' contents thereof to be fdecanted.

3. In a double tank, the combination of an outer receptacle, supports within the same, a second receptacle within the 'first resting on the supports, the bottom of the second receptacle being imperforate and the sides being formed with holes along theupper edges, the' sides below the openings being imperforate, a heating device below the outer receptacle, and a casing surrounding the tank.

4. ln a double tank, the combination of an outer receptacle, a second receptacle within the first and spaced therefrom, a piece of pipe connecting to the bottom of the inner receptacle, and a valve for closing the upper end of said pipe.

5. In a double tank, the combination of an outer receptacle, a second receptacle within the first and spaced therefrom and having an opening in its bottom, a ring secured to the bottom around the opening, a short piece of pipe screwed into the ring, and a valve closing the upper end of said pipe.

6. In a double tank, the combination of an outer receptacle, a second receptacle within the first and spaced therefrom and having an opening in its bottom, a ring secured to the bottom around the opening, a short piece of pipe screwed into the ring, a valve closing the upper end of said pipe, and means to heat the contents of the outer receptacle.

7 ln a double tank, the combination o f an outer receptacle, a second receptacle within the first and spaced therefrom and having an opening in its bottom, a ring secured to the bottom around the opening, a short piece of pipe screwed into the ring, a valve closing the upper end of said pipe, a casing eX,- tending around the outer receptacle, and4 a outer receptacle.

8. In a double tank, the combination of an outer receptacle, a second receptacle within the first and spaced therefrom and having an opening in its bottom, a ring secured to the bottom around the opening, a short piece of pipe screwed into the ring, a valve clos' ing the upper end of said pipe, and means to heat the contents of the outer receptacle, said inner receptacle havinga line of holes through its walls above the middle thereof.I

9. ln a double tank, the combination of an outer receptacle, a second receptacle within the first and spaced therefrom, the top of the sides of lthe inner receptacle being below the top of the sides of the outer receptacle, an inwardly extending flange on the walls of the outer receptacle above the top of the sides of the inner receptacle, and means to apply heat to the bottom of the outer receptacle.

tion.

WYMAN C. PARKER. 

